Preparation and characterization of the adduct uranium pentafluoride–arsenic pentafluoride (1/1)

Abstract

The systems UF₅–AsF₅, UF₆–AsF₅–UF₄, and UF₄–AsF₅–F₂ were studied using anhydrous HF as a solvent. In all cases a dark blue solution results from which blue crystals of composition UF₅·AsF₅ were isolated at temperatures lower than –30 °C. At room temperature thermal decomposition of the adduct takes place giving AsF₅ vapour, and a solid residue which was identified as β-UF₅.